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United States Patent | 5,283,572 |
McClelland ,   et al. | February 1, 1994 |
An interface to facilitate storing in an electric utility meter transponder, water usage data so that when remotely interrogated, access can be had to both electric and water usage data. A pulse indicative of water usage sets a magnetic latching relay in the interface circuit which causes a transponder supply voltage to be switched to two interface circuit timers. The first timer generates a first delay, after which the electric meter transponder is pulsed to register water usage. After a second, longer delay, the second timer resets the magnetic latching relay to thereby place the interface circuit in condition for receiving another water usage signal.
Inventors: | McClelland; Joseph H. (Mars, PA); Berns; Eric A. (El Paso, TX) |
Assignee: | Communications Instruments Inc. (Chicago, IL) |
Appl. No.: | 569178 |
Filed: | August 17, 1990 |
Current U.S. Class: | 340/870.02; 361/196 |
Intern'l Class: | H04Q 001/00 |
Field of Search: | 340/870.02,310 A,870.03,825.54,825.66,310 R 379/107 361/196,178 307/268,272.1,273,289,314 364/483 |
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Emetcon Automated Distribution System--Communications Guide dated Sep., 1989. Emetcon Automated Distribution System (color brochure)--May, 1988. |